Denied Claim: What You Need to Know

A denied claim does not mean the end of the road. It means your insurance company has made an initial decision — one that you have every right to challenge. Across the United States, insurers deny millions of claims every year, and consumer-protection agencies have repeatedly found that many denials do not hold up when people push back through the appeals process. Pushing back is your right, and it is often worth the effort.

Whether your denied claim involves a routine office visit, an expensive procedure, or an ongoing course of treatment, understanding why it was denied and what you can do about it puts you in control. This guide is the big-picture overview of a denied claim — what it is, why it happens, and how to fight it. If you are ready to write the appeal itself, our how to write an appeal letter guide and appeal letter sample walk through the wording step by step. Here, we cover everything from reading the denial notice to filing a successful appeal.

Types of Denied Claims

Not all denials are the same, and the type of denial determines your response strategy. A hard denial means the claim has been fully rejected and will not be paid without further action. A soft denial is a temporary hold or partial denial that can often be resolved by providing additional information or correcting an error.

Clinical denials are based on the insurer’s determination that a service was not medically necessary, was experimental, or did not meet clinical criteria. These denials usually require medical evidence to overturn. Administrative denials result from procedural issues such as a missing prior authorization, incorrect billing codes, expired referrals, or untimely claim submissions. These can often be resolved through correction and resubmission.

Technical denials involve eligibility issues, such as coverage that lapsed before the date of service, services received during a waiting period, or coordination-of-benefits problems. Resolving technical denials typically requires verifying enrollment records and coverage dates with the insurer or your employer’s benefits department.

Why Claims Get Denied

Understanding the root cause of your denied claim helps you craft the right response. Common reasons include lack of medical necessity as determined by the insurer’s clinical criteria, failure to obtain prior authorization or a referral, services received from an out-of-network provider, incorrect CPT or ICD-10 coding by the provider, duplicate claim submissions, services deemed experimental or investigational, exhausted benefit limits, and untimely filing by the provider.

Some denial reasons are straightforward to address. A coding error, for example, can often be corrected by the provider’s billing department and the claim resubmitted. Other reasons, particularly medical necessity denials, require a more substantive response with supporting medical documentation and a formal written appeal.

It is also worth knowing about surprise out-of-network bills. The federal No Surprises Act, in effect since 2022, protects patients from many surprise balance bills for emergency care and for certain non-emergency care delivered by out-of-network providers at in-network facilities. If you receive a bill you believe should have been protected, the Centers for Medicare & Medicaid Services describes your rights and a dispute process at CMS.gov. This is separate from a standard claim appeal but can matter when a denial leaves you facing an out-of-network balance.

Reading and Understanding Your Denial Notice

Your denial notice is required by law to include several pieces of information. It must state the specific reason for the denial, cite the plan provision that supports the decision, describe any additional information that could help resolve the claim, explain the appeals process and deadlines, and inform you of your right to request your claim file.

Read the notice carefully and verify that all identifying information is correct, including the patient name, date of service, provider name, and procedure description. Errors in any of these fields can cause denials that are resolved simply by correcting the information. If the denial reason is unclear, call the insurer and ask for a plain-language explanation. Note the representative’s name and any reference numbers provided during the call, and keep a dated log of every contact.

Your Rights and Protections

Federal law provides a strong foundation of rights for consumers who receive claim denials. Under the Affordable Care Act, most non-grandfathered plans must give you at least one level of internal appeal and access to an external review by an independent organization, as described at HealthCare.gov. ERISA provides additional protections for participants in employer-sponsored plans, including required timelines for insurer responses and the right to access your complete claim file.

Under ERISA’s rules, internal appeals of pre-service claims are generally decided within 30 days, and post-service claims within 60 days. Urgent claims qualify for expedited review, generally as soon as possible and typically within 72 hours. If the insurer fails to follow proper procedures, you may be deemed to have exhausted your internal remedies and can proceed directly to external review. For more detail, see the U.S. Department of Labor’s guidance at DOL.gov. Exact timeframes can vary by plan and claim type, so confirm the deadlines in your own notice.

State laws often provide additional protections. Many states have enacted independent review laws, consumer-assistance programs, and specific requirements for insurers regarding certain types of denials. Contact your state insurance department to learn about the protections available where you live; you can find it through the NAIC directory.

Steps to Take Immediately

As soon as you receive a denied claim notice, take these steps. First, do not ignore it. Deadlines for appeals are firm, and delay reduces your options. Mark the appeal deadline on your calendar and start gathering information right away.

Contact your healthcare provider’s billing department. They may already be aware of the denial and may be able to resolve it through a corrected claim submission. For coding errors, duplicate submissions, or missing information, the provider’s office can often fix the problem without your direct involvement.

If the denial is based on clinical grounds, contact your treating physician. Explain the denial and ask for their support. Your doctor may be willing to write a letter of medical necessity, participate in a peer-to-peer review with the insurer’s medical director, or provide additional medical records that address the insurer’s concerns.

Filing Your Appeal

For clinical denials and denials that cannot be resolved through correction and resubmission, a formal written appeal is your primary tool. Your appeal letter should identify the denied claim, state the denial reason, and present a clear argument for why the decision should be reversed. Attach all supporting evidence, including medical records, physician letters, and relevant clinical guidelines.

Send the appeal by certified mail with return receipt, or through your insurer’s documented portal, to create a record of timely submission. Keep copies of everything. For detailed guidance on writing your appeal letter, see our how to write an appeal letter guide and our appeal letter sample template. Those guides focus on the letter; this article gives you the surrounding strategy.

If the internal appeal is denied, you generally have the right to request an external review by an independent organization. You can also file a complaint with your state insurance department. External review decisions are typically binding on the insurer, which makes this a powerful step for consumers. Information on the federal external review process is available at CMS.gov.

Working With Your Provider

Your healthcare provider is a critical ally in challenging a denied claim. The provider’s billing department can identify and correct coding or administrative errors. Your physician can supply the medical evidence and expert opinion needed to support a clinical appeal. Many provider offices have dedicated staff who handle insurance appeals and can assist you with the process.

If your provider is unwilling to assist with the appeal, you still have the right to proceed on your own. Request copies of your medical records and any relevant correspondence between the provider and the insurer. You can also ask the provider’s office to submit a corrected claim or additional documentation directly to the insurer on your behalf.

Preventing Future Denials

While not all denials are preventable, you can reduce the risk by taking proactive steps. Verify your coverage before receiving services, especially for procedures, specialist visits, and hospital admissions. Obtain prior authorization when required and confirm it in writing. Use in-network providers whenever possible, and verify network status directly with the insurer, not just the provider’s office.

Review every Explanation of Benefits you receive and compare it against the services you actually received. Flag discrepancies immediately. Keep your own records of authorizations, referrals, and insurer communications. Understanding the basics of healthcare costs and insurance terms can help you anticipate and avoid many common issues.

Frequently Asked Questions

How long do I have to act on a denied claim?

Many plans allow 180 days from the date of the denial notice to file an internal appeal, though some set shorter deadlines. Check the denial notice and your plan documents for the specific timeframe. For urgent claims, you can request an expedited review. Do not wait until the deadline approaches; start the process as soon as you receive the denial.

Can a denied claim be sent to collections?

If the insurer denies a claim and you do not pay the resulting bill, the provider may eventually send it to collections. However, if you have an active appeal, many providers will hold the balance. Contact the provider’s billing department, inform them of the appeal, and request that collection activity be paused until the appeal is resolved. Try to get this agreement in writing.

What if the same claim keeps getting denied?

If a claim is repeatedly denied for the same reason, the underlying issue has not been addressed. Review the denial reason carefully and make sure your appeal or resubmission directly resolves it. If the denial is based on a clinical determination, stronger medical evidence or a different approach may be needed. Consider consulting a patient advocate or an attorney if you have been through multiple rounds without success.

Does a denied claim affect my credit score?

A denied claim itself does not affect your credit score. However, if the denial results in an unpaid medical bill that is sent to collections, the collection account could appear on your credit report. Recent changes to credit-reporting practices have reduced the impact of medical collections, but it is still wise to resolve billing disputes before they reach that stage.

How is a “denied claim” different from a denial letter or an appeal?

A denied claim is the underlying decision by your insurer not to pay. The denial letter is the notice that communicates that decision, and an appeal is the process you use to challenge it. This overview covers the whole picture; for the specific documents, see our insurance claim denied and appeal-letter guides.

Take the Next Step

A denied claim is a setback, not a stopping point. The appeals process exists precisely for situations like yours, and experience consistently shows that persistence pays off. Read your denial notice carefully, identify the reason, gather evidence, and file your appeal before the deadline. Our healthcare policy guide provides broader context on your rights, and our guides on insurance claim denials and insurance disputes cover additional strategies for navigating the system effectively.

Sources

• HealthCare.gov, “Appealing a health plan decision” (internal appeals and external review)
• Centers for Medicare & Medicaid Services (CMS.gov), external review process and No Surprises Act consumer protections
• U.S. Department of Labor (DOL.gov), ERISA claims procedure and appeal timelines
• National Association of Insurance Commissioners (NAIC), state insurance department directory